Objective This study aims to develop a guideline for assessing and maintaining intrinsic capacity in older adults,offer recommendations to professionals regarding these assessments,and encourage the implementation of evidence-based clinical practices across various settings,including communities,hospitals,nursing homes,and other geriatric care environments. Methods An evidence-based approach guided the collection of questions through a literature review. Preliminary recommendations were developed through a systematic search of domestic and international guideline networks,professional association websites,and comprehensive databases. Subsequently,the recommendations were revised,and the consensus was achieved through a round of expert consensus meetings and 3 rounds of expert correspondence,culminating in the formation of the guidelines. Results The developed guideline encompasses 2 aspects and 5 dimensions of assessment and maintenance,comprising a total of 28 questions and 39 recommendations. Specifically,6 questions and 9 recommendations were formulated for the cognitive dimension,5 questions and 7 recommendations for the locomotion dimension,6 questions and 7 recommendations for the vitality dimension,6 questions and 9 recommendations for the psychological dimension,and 5 questions and 7 recommendations for the sensory dimension. Among these,34 are classified as strong recommendations,while 5 are categorized as weak recommendations. Conclusion The guideline offers scientifically robust,acceptable,and comprehensible recommendations that equip the professionals with a foundation for decision-making aiming at preserving the intrinsic capacity of older adults.